实验室常用的弹簧称如图所示弹簧的一端与连接有挂钩的拉杆相连另一端固定在外壳上的o点外壳上固定一个圆环外壳和圆环的重为g拉杆和挂钩的重 Template




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tomski实验室常用的弹簧称如图所示弹簧的一端与连接有挂钩的拉杆相连另一端固定在外壳上的o点外壳上固定一个圆环外壳和圆环的重为g拉杆和挂钩的重 coloring